Door spring and stop.



PATENTED APR. 30, 1907.

A. C. WYMAN. DOOR SPRING AND STOP.

APPLIOATION FILED 1330.18, 1906.

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WE fncooes PATENTED APR. 30, 1907. A. c. WYMAN.

DOOR SPRING AND STOP.

APPLIOATION FILED DEG. 18, 1906.

2 SHBBTS-BHBET 2.

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ALVA O. WYMAN, OF

PATENT ()FI IQE.

SHELBURN, INDIANA.

DOOR SPRING AND STOP.

Specification of Letters Patent.

Patented April 30, 1907'.

Application filed December 18, 1906- Serial No. 348,479.

To (tZZ whom it may concern:

Be it known that I, ALVA C. VVYMAN, a citizen of the United States, residing at Shelb urn, in the county of Sullivan, State of Indiana, have invented certain new and useful Improvements in Door Springs and Stops; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to that class of springs applied to doors that serve to fully close them and also to stop them in fully open position against a tendency to close them.

The invention is clearly disclosed in the device portrayed in the annexed drawings, forming a part of this specification, in view of which it will first be described with respect to its construction and mode of operation and then he pointed out in the subjoined claims.

Of the said drawingsFigure 1 is a front elevation of the invention as applied to a door and door casing, showing the door in closed position. Fig. 2 is a plan of the same. Fig. 3 is a plan showing the door as stopped in open position. Fig. 4 is a section in the plane 4 1, Fig. 2.

Similar numerals of reference designate similar parts or features, as the case may be, wherever they occur.

In the drawings designates the door or it might, so far as this invention is concerned, be a gate, hinged at 11 to the casing or other support 12.

13 designates a plate perforated for the purpose of securing it by means of screws or otherwise to the wall or casing 12, and having the outer part 14, bent outward at a right angle to the body portion forming an arm provided with a perforation 15 near its outer end. The plate 13 is also provided a short distance from the hinge line of the door with a laterally extended stud 16, having a vertical perforation through its outer end.

17 designates a standard also perforated at its outer end and having laterally extended foot-plates 18 at its base by means of which it is secured to the door 10.

19 and 20 designate levers pivoted at their 1 inner ends respectively to the stud 16 and standard 17, and loosely connected on a pivot 21 at their outer ends. The lever 19 is provided about midway of its length it iih a stud 22 upon which one end of a rod 23 is pivoted. The other end of said rod projects through the perforation 15 in the arm 14. An expansible spring 24 is coiled around the rod 23, bearing at its outer end against the rigid arm 14, and operating with stress against the lever 19, and through it, the lever 20 and stud 17 against the door 10 to hold it when closed in that position.

Under the construction described it will be understood that the stress of the spring 23 will act upon the door to close the same when it is opened to a less extent than that indicated by the line a b which extends at an angle of ninety degrees to the closed position. l/Vith the door opened on said line the pivotal point 21 of the lever 19 will be brought into alinement with the pivot point on the stud 16 and the hinging point, or in other words on center with respect to the stress of the spring 23 when the latter will have no appreciable effect in moving the door. As soon, however, as the door is swung back of the line a b so as to carry it off center the action of the spring on the lever 19, and through its connection with the door, will tend to open it further or stop and hold it in open position. To close the door after being opened as stated it will be moved manually on its hinges toward closed position and beyond the line a b, when the action of the spring will fully close it and hold it in closed position. The form and manner of connecting and pivoting the levers 19 and 20 give them the nature of toggle levers, and their action, as has been seen, corresponds to levers of the specified'character.

The invention is designed to be employed on screen and storm doors, though it is equally applicable to other doors as well as to gates.

WVhat is claimed is In a door spring of the character described, the combination with a hinged door and its support, of an angle plate one arm of which is secured to the support and provided with a stud projecting therefrom at right angles and I the other arm projecting also at right angles l thereto, a plate secured to the door and provided with a standard projecting at right ansaid rod and interposed between said arm 14 gles therefrom, toggle levers pivotally con.- and the lever 19.. I nected to each other at their inner ends and Intestirnony whereof, I affiX my signature. pivotally connected at their outer ends rein presence of two Witnesses.

spectively to said stud and standard, a rod ALVA C. WYMAN. pivotally connected to the lever 19 and Witnesses:

mounted to slide in the arm 14 of the angle U N. H. DAVIS, plate and a coiled spring loosely mounted on 1 A. C. OWENS. 

